[lee_dewing]

Hello everyone

Customer called me to check her windows day after wfp clean

Two double glazed sash windows
Which have thin plastic beading in between
Upper and lower panes

So looks like 4 panes in a sash unit

Basically windows have blown
South facing and signs of dried water 💦 droplets between panes

But I’ve never seen fine lines like scratches before they are horizontal and slightly arched

In certain light lines are invisible
I cleaned both sides of glass with squeegee

You could see lines were in the middle

I’ve never seen lines in a blown unit?

Can anyone explain this ?

Or has a link ?

I’ve seen a dead fly between panes
Also an inch of water 💦
Before I’d cleaned 😁

Thanks lee

[Smudger]

Lots of glass has fine scratches in it - you just can’t see them when it’s clean - now the unit is misty it’s highlighting the scratches

Darran

[Spruce]

I wouldn't worry about it. The window needs replacing. You have no idea what has happened to the glass during its manufacture, assembly or lifetime. We have seen damage occur between cleans, caused from roofers and painters. 

We have seen all sorts of  patterns inside blown windows. Is hydrophobic glass hydrophobic on both sides when made? Is hydrophilic glass hydrophilic on both sides when made?

If the answer is yes, then we have to presume that condensation between the glass is going to act in the same way water droplets act when we clean them.

We were called back to a customer recently questioning the quality of our clean on their upstairs bedroom window. The window had blown and there were blocks of condensation in straight lines across the whole of the window between the glass panes. Interestingly, from the ground that window looked perfectly fine.

In this case my solution was to either replace the large pane of glass or leave it as privacy glass. 😂

[lee_dewing]

Thanks Smudger

Thanks Spruce, yes hydrophilic glass
Not misty between panes but could see where water 💦 droplets had dried between panes.

Weird arched very faint lines witch looked like scratches

When light came through glass lines were visible or invisible 🤦‍♂️😁

Customer had the ump as windows on her 3 storey Victorian house 🏡 cost 53k 6 years ago.

I cleaned  both sides of the kitchen window trad

It was obvious it was in between panes
I suggested contacting the window company
She was a bit aggy on the phone but ok in person

Bullet dodged anyway thanks

I’m glad I have liability insurance

Probably get round to reading small print and find excess wouldn’t have covered a new pane 😁
So she could see

[Spruce]

Thanks Smudger

Thanks Spruce, yes hydrophilic glass
Not misty between panes but could see where water 💦 droplets had dried between panes.

Weird arched very faint lines witch looked like scratches

When light came through glass lines were visible or invisible 🤦‍♂️😁

Customer had the ump as windows on her 3 storey Victorian house 🏡 cost 53k 6 years ago.

I cleaned  both sides of the kitchen window trad

It was obvious it was in between panes
I suggested contacting the window company
She was a bit aggy on the phone but ok in person

Bullet dodged anyway thanks

I’m glad I have liability insurance

Probably get round to reading small print and find excess wouldn’t have covered a new pane 😁
So she could see

We have had 2 windows replaced upstairs. The guarantee on the glass is 10 years.
However, if they fit double glazing into wooden window frames, the warranty is questionable as the frame expands and contracts more than plastic does.
The glass is also more 'solidly' fixed in a wooden frame with putty, which, in most cases dries hard, where the plastic strips securing the glass in place in upvc window frames allows the glass to slide asn it expands and contracts.

South facing glass windows are usually the first to blow as they experience a higher contrast between hot and cold temperatures.

We also find that glass panels in a frame that has a closing door or window are also inclined to fail first.

[S.A.J]

With the really hot summer this year I think there will be more blown windows this autumn/winter!

Be prepared